1887

Abstract

A novel actinomycete, strain RTBAU4-9, which produced longitudinally paired spores on aerial mycelia, was isolated from a soil sample of a hot spring area. This strain exhibited chemotaxonomic and genotypic properties typical of the genus Microbispora , such as meso-diaminopimelic acid in the cell-wall peptidoglycan, glucose, ribose and trace amount of madurose as the characteristic whole-cell sugars, phosphatidylethanolamine, diphosphatidylglycerol and phosphoglycolipids as the membrane phospholipids, MK-9(H4), MK-9(H2) and MK-9(H0) as the characteristic menaquinones, and iso-C16 : 0 and anteiso-C17 : 0 as the main fatty acids. The G+C content of the genomic DNA was 70.2 mol%. The result of 16S rRNA gene sequence analysis revealed the strain was a member of the genus Microbispora and was most closely related to Microbispora hainanensis 211020 (98.3 % 16S rRNA gene sequence similarity). In addition, the low percentage of DNA–DNA relatedness (<28.1±1.2 %) and several phenotypic differences confirmed that strain RTBAU4-9 should be considered as representing a novel species of the genus Microbispora , for which the name Microbispora soli sp. nov. is proposed. The type strain is RTBAU4-9 (=TBRC 7648=NBRC 113147).

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2018-10-16
2019-10-15
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